In 13 liters of 18% salty solution we add 402g of salt. What is the concentration of the new mixture?

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  21.1%

Step-by-step explanation:

Adding 402 g of salt to a solution whose volume is 130 × 100 mL will increase the concentration by (402/130)%, or about 3.09%.

When the concentration of 18% has 3.09% added to it, the concentration of the new mixture is about 21.1%.

Additional comment

We understand the units of concentration used here to be (1 g)/(100 mL) = 1%. These units are often used for a solution with a dissolved solid.

no, x cannot be the same number. in all of them, x is 1. for one input there is another output. g is not a function

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160

step-by-step explanation:

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